Enhance AWHP plant template to support 4-pipe heat pumps

[AntoineGautier]

This addresses #4512, with one exception: plants with modular polyvalent HP are not yet supported. Instead, the controller implements staging and valve/pump control logic for an arbitrary number of polyvalent HP. This reproduces the functionality of a modular polyvalent HP, just with the control logic hosted in the BAS instead of the HP onboard controller. The validation model Buildings.Templates.Plants.HeatPumps.Validation.AirToWaterPolyvalent reproduces the same plant layout as G36 Addendum L Figure A-35 (Primary-Only Modular Air-to-water Heat Pump/Chiller Plant), using individual polyvalent units instead of a single modular system.

⚠️ This PR includes many non-backward compatible changes, see release notes.

The Python script Buildings/Resources/Scripts/travis/templates/Plants.HeatPumps.py has been updated to test all valid plant configurations.

The validation models for several refactored control blocks (and therefore the main controller and the template model) fail to compile with OCT, due to ibpsa/modelica-ibpsa#2136 (to be addressed soon).

Most of the existing Extension Blocks under Buildings.Templates.Plants.Controls have also been refactored using only CDL Elementary Blocks.

• There is only a single remaining Extension Block: Buildings.Templates.Plants.Controls.Utilities.StageIndex
• The block Buildings.Templates.Plants.Controls.Utilities.TimerWithReset was refactored as proposed by @JayHuLBL in issue2293_chiller_plant_seq. It will be a duplicate of the block included in that latter branch when both branches are merged. @JayHuLBL let me know how you want to proceed: add a TODO in Chiller plant sequences #2299 to remove Buildings.Templates.Plants.Controls.Utilities.TimerWithReset before merging?

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⚠️ Regression with OMC for the model Buildings.Templates.ZoneEquipment.Validation.VAVBoxCoolingOnly

On the master branch (0192839), this model is not excluded in conf.yml.
However, it fails to translate with OMC on this feature branch (14d4519).
Considering the changed files, I cannot explain why this fails.
Curiously, when checking out this model from the master branch, it also fails to translate: see the log below.
The similar model Buildings.Templates.ZoneEquipment.Validation.VAVBoxReheat is already excluded in conf.yml.
I also excluded VAVBoxCoolingOnly in the latest commit 8ead0f0.

In [10]: omc.sendExpression('getVersion()')
Out[10]: 'OpenModelica 1.27.0'

In [11]: print(repo.active_branch.name, repo.head.commit.hexsha)
master 0192839096eb88d9d260b9390bff8efa3bca02b5

In [12]: omc.sendExpression('simulate(Buildings.Templates.ZoneEquipment.Validation.VAVBoxCoolingOnly)')
[OMC log for 'sendExpression(simulate(Buildings.Templates.ZoneEquipment.Validation.VAVBoxCoolingOnly), True)']: [translation:warning:398] Components are deprecated in class.
[OMC log for 'sendExpression(simulate(Buildings.Templates.ZoneEquipment.Validation.VAVBoxCoolingOnly), True)']: [translation:warning:499] Parameter datAll.tit24CliZon has no value, and is fixed during initialization (fixed=true), using available start value (start=Buildings.Controls.OBC.ASHRAE.G36.Types.Title24ClimateZone.Zone_1) as default value.
[OMC log for 'sendExpression(simulate(Buildings.Templates.ZoneEquipment.Validation.VAVBoxCoolingOnly), True)']: [translation:warning:499] Parameter datAll.VAVBox_1.coiHea.wAirEnt_nominal has no value, and is fixed during initialization (fixed=true), using available start value (start=0.01) as default value.
[OMC log for 'sendExpression(simulate(Buildings.Templates.ZoneEquipment.Validation.VAVBoxCoolingOnly), True)']: [translation:warning:499] Parameter VAVBox_1.datCoiHea.wAirEnt_nominal has no value, and is fixed during initialization (fixed=true), using available start value (start=0.01) as default value.
---------------------------------------------------------------------------
OMCSessionException                       Traceback (most recent call last)
Cell In[12], line 1
----> 1 omc.sendExpression('simulate(Buildings.Templates.ZoneEquipment.Validation.VAVBoxCoolingOnly)')

File ~/.local/share/mise/installs/python/3.12.13/lib/python3.12/site-packages/OMPython/OMCSession.py:410, in OMCSessionZMQ.sendExpression(self, command, parsed)
    407 # response according to the used log level
    408 # see: https://build.openmodelica.org/Documentation/OpenModelica.Scripting.ErrorLevel.html
    409 if log_level == 'error':
--> 410     raise OMCSessionException(msg)
    411 elif log_level == 'warning':
    412     logger.warning(msg)

OMCSessionException: [OMC log for 'sendExpression(simulate(Buildings.Templates.ZoneEquipment.Validation.VAVBoxCoolingOnly), True)']: [translation:error:63] Internal error NFConnection.checkBalance got unbalanced connection connect(sigBAS.busTer[1], VAVBox_1.bus):
  lhs: {sigBAS.busTer[1].TZonCooOccSet, sigBAS.busTer[1].TZonCooUnoSet, sigBAS.busTer[1].TZonHeaOccSet, sigBAS.busTer[1].TZonHeaUnoSet, sigBAS.busTer[1].damVAV.y, sigBAS.busTer[1].damVAV.y_actual, sigBAS.busTer[1].ppmCO2Set, sigBAS.busTer[1].y1OccSch, sigBAS.busTer[1].y1OveHeaOff, sigBAS.busTer[1].yOveDamPos, sigBAS.busTer[1].yOveFloSet}
  rhs: {VAVBox_1.bus.TAirDis, VAVBox_1.bus.TAirSup, VAVBox_1.bus.TZon, VAVBox_1.bus.TZonCooOccSet, VAVBox_1.bus.TZonCooUnoSet, VAVBox_1.bus.TZonHeaOccSet, VAVBox_1.bus.TZonHeaUnoSet, VAVBox_1.bus.VAdjAreBreZon_flow, VAVBox_1.bus.VAdjPopBreZon_flow, VAVBox_1.bus.VAirDis_flow, VAVBox_1.bus.VMinOA_flow, VAVBox_1.bus.dTHeaSetAdj, VAVBox_1.bus.damVAV.y, VAVBox_1.bus.damVAV.y_actual, VAVBox_1.bus.ppmCO2, VAVBox_1.bus.uCooDemLimLev, VAVBox_1.bus.uHeaDemLimLev, VAVBox_1.bus.y1FanSup_actual, VAVBox_1.bus.y1Occ, VAVBox_1.bus.y1OveOccZon, VAVBox_1.bus.y1Win, VAVBox_1.bus.yCooTim, VAVBox_1.bus.yEndSetBac, VAVBox_1.bus.yEndSetUp, VAVBox_1.bus.yHigOccCoo, VAVBox_1.bus.yHigUnoCoo, VAVBox_1.bus.yOccHeaHig, VAVBox_1.bus.yOpeMod, VAVBox_1.bus.yOveDamPos, VAVBox_1.bus.yOveFloSet, VAVBox_1.bus.yUnoHeaHig, VAVBox_1.bus.yWarTim, VAVBox_1.bus.yZonPreResReq, VAVBox_1.bus.yZonTemResReq}